Wuxi New District Jincheng Electric Co

BB inverter repair scope: mechanical transmission series, series, 3 series, series inverters, standard transmission series, series, 3 series inverters, industrial transmission series inverters, series inverters
BB mechanical transmissions are many It provides speed control for a variety of industrial applications, from spa equipment motors to treadmill motors, as well as high-precision positioning systems and synchronization system applications.
BB standard drives are easy to purchase, install, set up and use, saving a lot of time. They are widely available from BB's distributors and are therefore called standard drives. This type of frequency converter has common customer and process interfaces with fieldbus, common software tools for specification design, debugging and maintenance, and common spare parts maintenance.
BB industrial drives are designed for industrial applications and are particularly suitable for industrial process control fields such as pulp and paper, metals, mining, cement, electric power, chemicals, oil and gas, etc. It can not only be used as a complete AC drive, but also as a modular unit to meet the requirements of users and system integration. BB industrial drive is a highly flexible AC drive. After certain configuration, it can meet various precise controls in the industrial field. Therefore, customization to order service is an integral part of the supply
BB inverter fault analysis :
BB inverter has not been in the Chinese market for a long time, and it has also gone through a process of being unfamiliar to recognized by the majority of customers. However, its development is very rapid and it is constantly upgraded and updated. For the old-fashioned For some inverters, do the following analysis:
3. When repairing BB inverters, the faults we often encounter are damage to the switching power supply, sudden changes in the working voltage, and damage to the load carried by the switching power supply. As a result, damage to this integrated block occurs from time to time. Due to long years of use, the electrolytic capacitor has also reached its service life, and the capacitor used for filtering has become the direct cause of damage to the switching power supply. If the rectifier bridge of the 3-frequency converter is often damaged, perhaps from an economic point of view, the most compact three-phase full-bridge rectifier from the International Rectifier Company is selected. The volume and load current are small, and the heat dissipation is also poor, so Damage occurs after a period of use. 3. Mitsubishi modules are selected, which have a relatively low probability of failure. If the module is damaged, it can only be replaced, but the drive circuit must be completely normal before replacement.
The most common faults of frequency converters include damage to the drive thick film. This drive thick film not only includes drive circuits and circuit board repairs, but also includes short circuit detection, B module detection, overcurrent detection, etc. Due to good protection Functional, high-power modules are rarely damaged. A common phenomenon is that you only hear a buzzing sound after powering on, but the fan does not rotate. Because it is an axial flow fan, the fan coil and bearings are often normal. After inspection, it was found that the deflection capacitor was faulty, and it returned to normal after replacement. .
It should be said that the performance and quality of the frequency converter are quite reliable. However, due to the influence of the surrounding environment, improper parameter settings, and improper operation, it is possible to cause damage to the frequency converter. Of course, natural damage is also caused by everyone. The brand of inverter is an unavoidable factor. Using intelligent modules, load failures and some problems during use can cause module damage, and module damage is often accompanied by damage to the drive board. Since spare parts are relatively expensive, the cost of repairing the inverter is also relatively high. It is higher, so it puts forward higher requirements for maintenance personnel to perform board-level maintenance.
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